Adjustable piston for gas engines



R. F. WHITE ADJUSTABLE PISTON FOR GAS ENGINES Sept. 18, 1945.

Filed Dec. 2, 1943 INVENTOR Rczv/zE'Wh ite.

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ATTORNEYS Patented Sept. 18, 1945 UNITED STAT ES PATENT pm;

ADJUSTABLE PISTON FOR GAS ENGINES Ralph F. San Bernardino, Calif. I Application December 2, 1943,- Serial No. 512,623

3 Claims. ('01. 309-42) The invention relates to engine pistons, and more especially to adjustable pistons for engine cylinders.

The primary object of the invention is the provision of a piston of this character, wherein the cross-sectional diameter can be regulated, without impairing the proper fitting of its head and connecting rod pin, the piston being of novel construction, and is unique in its make-up, it having a split interlocking characteristic, insuring maximum life and service.

Another object of the invention is the provision of a piston of this character, wherein slack in the same due to wear can be readily and easily takenup to assure proper compression within the cylinder having it fitted therein, with an increase in power and a saving in gas and oil.

A further object of the invention is the provision of a piston of this character, wherein through adjustment thereof, the re-boring of cylinders is obviated, and an adjustment can be made without removing the piston from its cylinde'r of the engine in which it is installed.

A still further object of the invention is the provision of a piston of this character, which is simple in construction, thoroughly reliable and efficient in purpose, strong, durable, readily and easily adjusted, thereby saving repair costs, and inexpensive to manufacture and install.

With these and other objects in view the invention consists in the features of construction, combination and arrangement of parts as will be hereinafter more fully described, illustrated in the accompanying drawing, which shows the preferred embodiment of the invention, and pointed out in the claims hereunto appended.

In the accompanying drawing:

Figure l is a sectional View taken on the line ll of Figure 2 looking in the direction of the arrows, showing the piston constructed in accordance with the invention.

Figure 2 is an elevation of the piston.

Figure 3 is a top plan view of the same.

Figure 4 is a sectional view taken transversely.

of the piston on the line 44 of Fig. 1.

Figure 5 is a fragmentary perspective View, partly broken away.

Similar reference characters indicate corresponding parts throughout the several views in the drawing.

Referring to the drawing in detail, A designates generally a piston constituting the present invention for use in an engine cylinder, and comprises a sectional cylindrical body forming a skirt to the piston, involving the companion sections I0 and II, respectively, which are halves of the said body and match each other in the assembly of the latter.

These sections l0 and l I at their meeting edges longitudinally thereof have straight rabbeted lower edge portions I2, and upper rabbeted saw tooth-like remaining edge portions I3, throughout, the latter edge portions l3 being extended beyond the edge portions l2 and intermesh with each other.

The compression end of the body of the piston A has removably fitted therein a disk-like closure head M, which is formed with a beveled screw threaded peripheral edge [5, adjustably engaging a companion threaded seat l6 correspondingly beveled to the edge l5, so that when the sec-,

tions In and II are moved apart or brought together, a screw threaded seating of the head ["4 is assured. The sections In and l l are adjusted relative to each other to take up wear on the cylinder or the piston when interfitted with one another, thereby avoiding the re-boring of the cylinder, the latter not being shown in the draw- The head M in its outer face is formed with key sockets I! so that it can be worked home by a tool in a convenient manner when the piston is within the cylinder, or for the removal of the head l4, while the piston is in place.

The rabbeted edge portions I2 and I3 of the sections l0 and II overlap one another at all times when these sections are fitted to each other,

Formed within the body of the piston A and intersecting the meeting edges of the sections In and l l are wrist pin bosses l8, each being halved concurrent with the edge portions l2 and I3, and such bosses have bolt ears l9 for coupling bolts 20, which are removably fitted therein. In this manner the sections Ill and II are adjustably connected together. There is of course to be exteriorly fitted to the skirt of the piston A any conventional type of piston ring, for example as at 2| and 22, respectively.

The bosses l8 are formed with beveled threaded openings 23 for adjustably accommodating correspondingly beveled threaded bushings 24, having the wrist pin 25 fitted therein, as is clearly shown in Figures 1 and 4 of the drawing.

The bushings 24 are formed with flat faced nut-like inner ends 26 so that the same can be readily and easily adjusted when within the bosses l8, or inserted or removed therefrom.

The assembly of the piston A is well disclosed in Figures 2 and 3 of the drawing, while Figure 5 shows the overlap of the edge portions l2 and I3 of the sections In and H and the association of the head [4 therewith.

What is claimed is:

1. A piston of the kind described, comprising .a cylindrical sectional body forming a skirt, rabon the sections meeting each other, a head removably and adjustably fitting one end of the body when the sections thereof are assembled together, a wrist pin fitted within the body, means adjustably and detachably connectin the sections of the body together, and bushings associated with the wrist pin and sections of the body.

3. A piston of the kind described, comprising a cylindrical sectional body forming a skirt, rabbeted and saw tooth-like interfitted edge portions on the sections meeting each other, a head re movably and adjustably fitting one end of the body when the sections thereof are assembled together, a Wrist pin fitted within the body, means adjustably and detachably connecting the sections of the body together, and bushings associated with the wrist pin and sections of the body, and adjustably and removably connected to the latter.

RALPH F. WHITE. 

